hello im using a pic 18f4520

i have connected a stepper motor into port D

everything is running as expected but i am intrested into why it is best to use port d

or does it not matter ?

 

sorry i forgot to mention one other think

i have a variable resistor connected which is varying the speed as expected

is there an alternative i could of used instead of the variable resistor ? to change the speed like this does ?

 

Where did you get the preference for port D, as far as I can tell it port D just has an option of a PSP, Parallel Slave Port.
Max.

 

for some reason ive always used port d

which is now why i wanted to know lol

so there is no advantage at all with port d?

like for example port a has adc so i would use that for that purpose

 

Are you using portD for output to the stepper motor or an input for control?
Max.

 

im using a darlington driver

so port d goes to darlington darlington goes to stepper

 

hello im using a pic 18f4520

i have connected a stepper motor into port D

everything is running as expected but i am intrested into why it is best to use port d
...

PORTA has the ADC inpuits and comparators.
PORTB has the internal pullups (good for connecting buttons).
PORTC has the CCPs for timing and PWM, and the RX/TX UART, MSSP SPI port etc.
PORTD is often the "preferred" port for simple parallel tasks (like a stepper motor).